In ancient times, the sun stopped at sunrise and sunset, and lights were lit at night. Usually, if I have nothing to do, I go to bed early.

After the Song Dynasty, there was a night market, and the city was brightly lit at night. Probably, after listening to books and watching plays.

Some scholars burn the midnight oil at night. There is an interesting poem by Yuan Mei in Qing Dynasty:

"Cold Night": "Reading and forgetting to sleep on a cold night, the incense burner is smokeless. In a rage, the beauty grabbed the lamp and asked Lang Zhi what day it was today. 」